Disk strain-insulator.



L. STEINBERGBR. DISK STRAIN INSULATOR.

APPLIOATION FILED JAH.20, 190B.

Patented Nov. 17, 1908. l

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hf/KWI/ 0 Ammers LOUIS STEINBERGER,

0F` NEW YORK, N. Y.

:DISK STRAIN-IN-BULATOR.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Application Sled. January 2Q, 1908. Serial No, 411,812.

To all whom 'it may concern: Be it known that I, LOUIS STEINBERGER, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State 'of New York, have invented a new and Imroved Disk Strain-Insulator, of which the ollowing is a full, clear, and exact description.

My `inventionrelates to strain insulators, and particularly those'of the disk type, my more especial object being to im rove the i general construction of such insu ators and to render them, as near as practicable, proof against the evil effects of moisture.

My invention further relates to increasing the dielectric pro erties of said insulators and giving them a righ degree of mechanical stren h.

Re erence is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is an end elevation of the disk insulator complete, this view showing the eyebolt and also the various annular' hoods used for enabling the insulator to shed moisture; Fig. 2 is an enlarged central elevation through the insulator, on the line 2-2 in Fig. 1, showing the metallic parts and their relations to the insulating material, and also showing the location of the several steps and annular flanges of insulat'rn material, forming an integral part of the t isk; Fi 3 isan enlarged perspective view of one o the metallic tension members to bc embedded within the insulatin material, this tension member having the orm of a frusto-ctihical collar `and a bail formed integral therewith and adapted to be partially embedded Within the insulatin material; Fig. 4 is an end eleva tion of tie frusto-conical collar provided with a bottom having an opening and also having a slot merging into said opening to facilitate the entrance of a portion of an eyebolt or other tension member into the frusto- ,conical collar; Fig. 5 is a side elevation showing two of my 'improved disk strain i insulators connected together for withstandvide flexibility to the structure, und to perl mit one'or more of the disks to be rotated to any desired extent relatively to others when required. i f

A bail 6 is provided with enlarged portions and with a frusto-conical collar 8 having a bottom 9, all of these parts being integral. The collar Slis provided withaslot 11, which extends through the bottom 9, and merges into the opening 10, as shown in Fig. 4. An e 'e-bolt 12 is provided with a stem 18 and w1t'h a-conical head 14these parts being integral. The eye-bolt may be partially inserted within the collar by passino the entire bolt into the bail 6, the eye-bolt 12 bcing caused to protrude through the slot 11. This slot may be made of considerable width, as shown, for the purpose of allowing the eye 12in be made comparatively large. The form of the slot 11 can best beunderstood by reference to Fig. 2, the collar 8 being so shaped internally as to form parallel sides for tbc slot, these parallel sides extendin to the enlarged portions 7 of the bail. is form also affords an excellent anchorage for the insulating material hereinafter described.

.it l5 is a inas-x ot' insulating material provided with steps 16 of annular conformity, and further provided with an annular `flange 18 separated from the steps by an annplar groove 17. A largerflange 20, also of annular form. is disposed adjacent to the flange 1S and separated -thcrefrom b v an annular groove 19. A disk 21 extends directly-outward and at a right angle relatively to the strain members. The disk, flanges and central bodynportion are preferably made from a single integral mass of insulating material.

The above description of the insulating lnairrial relates only to the rifrht-hand side' of the same, as seen in Fig. 2. lheleft-hand side being of analogous conformity, 1t follows that the various flanges and stepsare made in pairs, the members of each pair be ing dis )osed oppositely to, and integral'with, each otlher as will be understood from Fi 2. In assembling the insulator, the eye-bo t is so placed that the head 14 occupies the center of the collar 8 and the insulating material is forced int'o and around the head 14 so as to occupy the interior of the collar 8. The portions 7 of the bail 6 are thus embedded within the insulating material and owilw to their form they are not easily dislodtged therefrom.

'lbc various steps 16 and pairs of hoods 18, QO'are formed by molding or pressing up the 22, 23 are connected by a stem 25 mounted possible form of electrical insulation. -These shown, nor to theprecise form of either of the s eparate portions. ,-"Neither do I limit fparting from the spirit oi'scope of' my inplastic material in molds suitable for they purpose. With an insulator made as above l described and mounted so' that its general axis of sus ension is horizontal, the pairs of ianges an the grooves separating the same serve to prevent the effective entrance of moisture in such manner as to destroy the dielectric qualities of the insulator. As may be seen from F ig. 2, it is impossible for rain to so thoroughly IWet all parts of the insulator as 'to invite undue leakage of the electric current. If the rain flows into the insulator from the right-hand side, some parts of the annular ianges will remain dry. Similarly, if the rain beats in from the left-hand side, according to Fig. 2, some parts of the flanges will likewise remain dry. Unless the rain assumes unusual, violence, it is diicult, if not impossible, for the moisture, due either to the spattering of rain drops, .the lateral effect of the Wind upon the rain, or the creeping of rain water from any cause, to tota ly destroy, or even to seriously' impair, the insulating qualities of the device.

As indicated in F ig. 5, two insulators of the kind above described may be connected i together. In Fig. G I show more in detail the construction of the swivel used in con` necting the tivo insulators together. Clevises integrally upon the clevis 23, this stem terminating in a head 24. Pins 26, 27 pass through the twoy clevises 22, 23 and serve to connect the latter with the insulators,

Owing to the novel design of my disk strain insulator, it will be readily observed that it affords a large interrupted insulating surface for the prevention of surface leakage, thereby providing a very large factor of safety. The form of the stiain members and their disposition relatively to each other and to theinsulating disk is such as to provide a strain insulator lof exceptionally great mechanical strength, combined with the highest isk insulators may be used separately or a number of them may be linked or connected together in any preferred manner for sup porting a line, dead ending, or in any other relation where currents of very high potential are employed.

I do not limit myself to the use of any prescribed materials, I prefer, however, to employ the insulating material Well known in v ,the art as electrose. Nor do Ilimit myself o an insulator constructed exactly as mysel to any particular combination of these parts, for the reason that variations may be made by those skilled in the art Without de ventio Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

l. An insulator comprising a collar pro vided with an opening and with slots merging into said opening, an eyebolt provided with an eye adapted to pass through said slots and said opening, and further pro vided with a head, said head being disposed within said collar and concentric thereto, and a quantity of insulating material dis posed intermediate said head and said collar. r

extending practically the entire Width of the bottom, said slot being provided with Walls substantially parallel with each other and thus inclined relatively to the outer ortion of said frusto-conical member, a bo t provided With a stem extending through said slot and further provided with a portion disposed .inside of said frusto-conical member, and a mass of insulatin material partially embedding said bolt, sai mass of insulating material internally engaging said metallic member of frusto-conical form.

4. An insulator com rising a metallic collar of frusto-conical orm provided with a bail, and further provided with a central opening 'and with a slot merging into said central opening, said slot being of great width and bounded by walls spaced apart by a distance representing practically the greatest inner diameter of said frusto-conical collar, a bolt ext-ending through said central opening and provided with aportion concentric to said truste-conical collar, said bolt being provided with a portion of proper size to pass through said slot, and insulating material disposed intermediate the enlarged polil'tion of said bolt and said frusto-conical co ar.

5. A disk strain insulator, comprising al air of suspension members, and a mass of insulating material partially envelopin the same, said mass of insulating material ing provided with pairs of flanges extending in opposite directions, the individual flanges of pairs overlapping.

6. A disk strain insulator, comprising a pair of metallic suspension members, and a` mass of insulating material partially Venvelopin the same, said mass of insulating materia being provided with flanges extending 'nular form concentric to sai in opposite directions, and ,further provided with a disk disposed intermediate said flanges and of greater diameter than the saine.

'7. A disk strain insulator, comprising a plurality of tension members, and a mass of insulating material partially enveloping the 8. 'A disk strain insulator, comprising suspension members, and a mass of insulating material partially enveloping the same, said mass of insulating material being provided with an annulaiflange projecting a little distance from the general equatorial plaine of said mass of insulating material, and further provided with a lar er flange of anfirst-mentioned flange and extending a greater distance than the same from said general equatoril plane.

9. A disk strain insulator, comprising suspension members, a mass of insulating material partially enveloping the same, said mass. being provided centrally with a disk integral therewith and lying substantially in the General equatorial plane of said mass, and urther provided with langes extending in opposite directions from said equatorial plane. Y

1l). A disk strain insulator, comprising suspension members, a mass of insulating material partially envelopinfx the same and having a disk portion, said disk portion being provided with annular collars extending in opposite directions and in the general direction of said suspension members. same, said insulating material bemg formed into flanges and also into steps.

1]. A disk strain insulator, comprising st rain members, a body of insulating material partially enveloping the same and having a comparatively large disk, said disk being provided With collars integral therewith and extending in opposite directions.

12. An insulator, comprising a hollow member provided Witha bottom and further provided with an opening in said bottom and with slots merging into said opening, a bolt provided with a stem extending through said opening and with an enlarged portion disposed Within said hollow member, and insulating material disposed intermediate said enlarged portion and said hollow member.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

LOUIS STEINBERGER.

lVitnesses lVALToN HRRISON, JoHN I.A DAVIS. 

